Apparatus for making hollow bends, angles, or such like bodies of concrete or other material



June 28 1927. 7 1,634,045

w. A. PORTER APPARATUS FOR MAKING HOLLOW BENDS, ANGLES, OR SUCH LIKEBODIES OF CONCRETE OR OTHER MATERIAL Filed June 50, 1926 Patented June28, 1927.

warren sTArss 1,634,045 PATENT oFF cs.

WILLIAIVI ALFRED PQRTER, OF BRISBANE,QUEEN SLAND, AUSTRALIA, ASSIGLIOROF ONE-HALFTO HILLIAM VALENTINE SCANLAN, OF BRISBANE, AUSTRALIA.

APPARATUS FOR MAKING HOLLOW :snnns, ANGLES, OR SUCH LIKE BODIES orCONCRETE onorHER MATERIAL.

Application filed June 30, 1926, Serial No. 119,729, and. in AustraliaAugust 26, 1925.

to a very great extent, leaka ge of any fluids which may bepassing'through. So far as I amaware,'it has not been possible to manufacturehollow bends, angles, junc-' tions, and other such ducts or mouldingswherein the material is of a similar density except by the-vibratoryprocess, which is slow, and the articles, when produced, 1nvariablycontain pores which are a cause of weakness. J

The object of this invention is the production of a machine wherebythese articles can be made free of pores and in very much less time.

In carrying out my invention I provide a number of rectangular orotherwise suitably shaped plates of iron or suitable-materal, mountedupon a wooden or other suitable base forming a mould box in which thearticles are moulded and which are bolted or otherwise secured togetherand are carried in a suitable frame so that they can be rotated at thedesired speed. These mould boxes have a central hole or passage throughthem, and'radiat-ing therefrom or arranged tangentially thereto is anumber of moulds of the required shape and size, in which the bends orangles or other articles are formed. The cores are. carried by suitablemeans. The moulds may be formed in each face of the plates so that eachplate may carry two half moulds. As an alternative, I may form themoulds in a solid mass, of iron, concrete, or other material, instead ofin the face of the plates. I

To the mould boxes are fitted sectional cover plates, either singlyor insets, and these mould boxes are assembled in a separable cylinder orotherwise held in position so that they may be spun round at any desiredspeed and by any suitablemeans.

To fully describe the invention reference is now made to theaccompanying drawings, in which:

Fig. 1, is a perspective view showing two sets of plates boltedtogether.

Fig. 2, is a plan view of a plate showing the moulds for making bends.

Fig. 3, is a perspective view of cover for .one side for one set ofplates.

Fig. 4, is a cross section of cover, moulded article, and core. 1

Fig. 5, is an 'elevatio'n'of core.

Fig. 6, isan end view of core.

F ig...7, isv an end view of mould box and coverto reduced sealer I Fig.8, is'anelevation of frame.

Fig. 9, is across section-of lnould box showing frame fitted in thecentral passage.

.Fig. 10,. is a perspective view of a separable casing forassembling themould boxes.

Fig. 11, is a longitudinal sectionof separable casing showing mouldboxes assembled, Figs. 12 to 15 are elevations of various articles.

, The reference numerals serve to indicate like parts in all figures.

1 are the mould plates and l their bases,

2' the central passage through the mould boxes, .3 the'moulds, 3" themoulded article, and 4 rubber washers, or other insertion to prevent anyleakage ofthe material used. I

6 is a section of the cover plates, which are kept in place on the mouldboxes by dowels 7 fitting into holes 8 in the under side ofthe coverplates, and secured by studs 9 and turn buttons 10. Two or more of thehalf moulds are bolted together by bolts and nuts 11.

The cores are made in three sections consisting of two outer sections 12and a central tapered section 1S,'by which the outer sections are lockedtogether. This provides a collapsible core, which can be easilywithdrawn from the moulds.

14. is a hinged cylindrical or other casing for assembling the mouldboxes, the two halves ofwhich are clamped together, 15 indicates thehinge, and 16 the clamping flange. If of shape other than cylindrical,circular tracks would be formed or secured thereon so as to facilitaterotation.

As an alternative arrangement, the cylindrical or other casing may bedispensed with and circular end plates secured at each end of the unitsof moulds. In this, as well as the arrangement where the casing is used,dowels and dowel holes may be provided in the respective faces of themould, so as to ensure their correct registration.

17 are flanges which fit inside the cylinder and which are clampedthereto by bolts 18. The central passages 2 through the two end mouldboxes assembled in the casing are fitted with square metal frames 19with,

rounded corners held to mould boxes by lugs 20 and turn button 21. Theseframes coir tract the size of the holes, prevent the filling materialtrom esca in and enable the same to be fed into the mould boxes from bothends ofthe; casing, and, when removed, provide for the removal of theslurry or any over-plus of material ted to the moulds.

In using the invention, I prefer to secure two half mouldboxes togetherby the cover plates 6, which then form a unit. it then assemble a numberotthese u its and. secure them together by bolts and nuts 11 and titthem intoa separable cylinder by clamping the cylinder together byclamps or by other suitable means. The assembled units are then rotatedat high speed and the concrete or other materiahas it is. fed into thecentral holes of the units, is, by centrifugal force, thrown outward inthe respective moulds. li hen the moulds are filled, the mouldedarticles re allowed time to set, and, by dissembling the mould boxes andremoving the cores, lie moulded articles can be withdrawn from themoulds.

Slight modifications may be resorted to without departing from thespirit or scope of the invention.

l/Vhat I claim as my invention, and desire to secure by Letters Patentis V 1. In improvement in apparatus for making hollow bends, angles orsuch like bodies of concrete or other material, the combination of mouldboxes consisting of half moulds formed of the required shape heldtogether by sectional covers and provided with a central teed hole asand for the purpose set herein described. 7

t. In improvements. for making hollow bends, angles orsuch like bodiesof concrete or. other material the combination of mould boxes consistingof halt'moulds tormedoi' the requiredshaqpe held together by'sectionalcover plates, means for attaching the said plates to the mouldboxes, andcollapsible cores, said mould boxes provided withacentral hole as hereindescribed.

5. Inimprovements for making hollow bends, angles or such like bodies;o:t-concrete or other material the combination of mould boxes, coverplates and cores as claimed in claim 1 in combination with a, separablcasing provided with flanges as herein described.

In testimony whereofI afl ix nay-signature.

WILLIAM ALFRED PORTER;

